Sparking mechanism.



PATENTED APR. 21, 1908.

H. G. & G. G. GOULSON.

SPARKING MEGHANISMJ APPLICATION FILED JUNE 24, 1907.

v dbboeng.

T all whom. it may concern:

UNITED STATES PATENT OFFIGE.

HARRY G. COULSON AND CHARLES C. UOULSON, OF JAY COUNTY, INDIANA.

SPARKING- MECHANISM.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed June 24, 1907. Serial No. 380,391.

. Be it known that we, Hann'v G. CoULso-N and CHARLES C. COULSON,citizens of the United States, residing in the county of Jay and Stateof Indiana, have invented new and useful Improvements in SparkingMechanism, ofwhich the following is a full, clear, and

v comprehensive. exposition and s ecilication,

being such as will enable others s 'illed in the art to which theinvention relates to makeand use the same with absolute exactitude. Theobject of our present invention, broadly speaking, is the provision ofan improved construction .of the class stated designed to give a maximumof mechanical efficiency with a minimum of expense, to provide anelectrical sparker constructed on new and improved lines, and in whichthe item of exense, for installation and inaintenanoa will be racticallynil.

(,ther objects and specific advantagesof our invention will appear inthe course of the ensuing specification, and the oints which are newwill be correlated in t 1e appended claims.

Our invention is intended primarily to be employed in connection withthe explosion chamber of gas'or gasolene engines, and the specialfeature of our invention which we desire to emphasize is: The lacing ofthe larger striker-arm, employed in reaking contact of sparker-pomtsandalso all springs, upon members other than the sparker shaft.

Probably the best exemplification of the ossibilities and advantages ofour invention is shown most clearly in the accompanying drawin s,forming a part of this specihcation, in whic 1 Figure 1 is a plan orface view of our invention as ap lied to the cylinder of an explosionengine. ig. 2 is a vertical part-sectional view of the parts shown inFig. 1. And Fig. 3 is a detail view of the free end of the adj ustableactuating-arm.

Similar indices denote like parts through out the several views.

In order to render the construction and operation of our inventionreadily under stood, we will now take up a detail description thereof,in which we will describe the construction and operation of theinvention as briefly and as compactly as we may.

i The letteri, designates a portion of the cylinder-wall of an explosionengine, the parts to the right of which, in Fig. 2, are outside and theparts to the left are inside the cylinder. An aperture is formed throughthe wall into which is threaded the plug or bushing g, which has acentral aperture longitu (linally therethrough into which is' rovolublymounted the sparkcr-shaft a. which is expanded at its inner end wherebyit is taper seated at its inner end against the inner end of the plug orbushing 9 whereby said shaft may not he moved outward cndwise.

The letter It designates the contact arm which is integral, or)ermanently secured, to the inner end of the shaft (1, and it isdisposed at right-angles thereto and it extends upward some distance asdesignated in Fig. .2. Extending out from near the upper end of thecontact-arm is a terminal or contact-point s.

The letter h designates the insulated electrode which extendsthrong-lithe wall i being so located as to engage the free end of thearm 7c, and secured in said electrode, is the terminal or contact point8 which is adapted to contact with the point 8. To the outer portion of"the electrode 7b is attachedthe electric current wire Q. On the outerextending portion of said plug or bush ng is formed, longitudinallythereof, a bearing face for the large striker armfwhich as is apparenthas no direct connection with the shaft a, except by the interpositionof the small striker arm I), which latter is secured to the outerportion of the shal t a by the taperpin 0. The letter e designates ahelical spring which is convoluted around the shaft 0 but .is separatedtherefrom by the reduced extension of the plug or bushing 9 whose outerterminal acts as'a shoulder for the inner face ofthe head of the smallstriker arm 1). One

end ofsaid spring a engages the striker-arm f and the other end thereofengages the arm I), with the torsion of said spring a such as normallyto retain said arms in contact with each other.

The letter 1* designates the actuating shaft which is, in this instance,revolubly mounted parallel to the shaft (1. and it is located somedistance therefrom. The actuating arm p is adjustably secured, by theset-screw 2, to the shaft 1", and carried by said arm 1) is the springactuated bevel-end plunger 0, the same being mounted for endwisemovements arallel with the arm and being normally 1m elled in adirection from said shaft by the c'oi spring N shown in Fig. 1.

The letter we designates a sto for the arm f, and the letter adesignates a-lielical sprin secured at one end to the arm f, and securetravelin' fro v termina point ,9, the "resultant I spark being ,1.

'rests resiliently against the stop at the other end to the wall-i, toretain said arm f normally, in position to, be engaged by the plunger0,and when not engaged said arm f m, at the same time retainlng thetermmisand s apart, as shown in F1 1.

It will. now,be notably ap arent that if the striker arm f be acted upony the plunger 0,

carried bythe arm p, it will be moved to the 10 -1n-Fig. 1, the shaft 1"continuously revolving] sition in which it is shown inrdottedf lines inthe direction indicated by the arrow... It is" also apparent thatwhen-the arm'f moved as described the shaft a will consequently followin rotation, resiliently, bythe action of the torsion of the spring,]until the terminal points 8 and s nge against each other; after whichthe shaft a, and. the arm blwill stop hile-the arm f continues torotate,-constantly-increasing'the tension of 'thes' ring "e. As soon asthe arm p moves far enoug to release the arm ffrom'the plunger o'thenthe spring e return thea'rm f smartly back against-thearm b,'.thereb'ymaking an lnstane,

taneous break of the currentfwhich may be the terminal points tomb ofthe desired sufficiency toi fire the charge containe'd inithe-cylinder."

Itwill readily .be. deter n1ined "tliat the action of the. sparkerli'sindependent-of the speed ofthe engine, that to'say'of the shaft, 1',andhence there willbe novariation invthe size of. the s ark produced,swhile at thesame time it will e perfectly timed. *It isvals'o a" arentthat the circuit ,periodica y y roken, the spark being; producedbetween". the terminalcontacts at eve interruption of. thecurrent,and'that,when tl1 I D e. engine is not f in operationthelcte'rrninal pointswill be Separated, thereby-preventing awasteofcurrent.

It, should be noted; also,*that should} the:

shaft 1' be rotated reversely that'no damage will resultfas the ta er ofthe lunger. 0Z'w11limpinge thetaper c whe rm -andtherebydriyingtheplunger"downinto the arm' 1) un r the p til' the 1points have'assed each othen after which t e'plunger-W be ilplpelled to its normalposition b the s ring Wedesire t at it eundei'steodthatthe.

specific construction of ,the details'i; f the in- "vention in whichnovel. features, are yembodied, as,well.as the general construction ofarts,- "may be I variously changed and modifiedfwithou't alteringthe.essent1al printably "mounted on the bushing" at a distance from saidother arm-but having a portion adapted to contact therewith, a springcoiled about the bushing between sai v operatively connected therewithat. its ,ends, and mean's for actu atingsgaid striker, arm;

2. Sparker' mechanism for] gas" engines, 1

comprlsing a bushing,- haying its outer end port on reduced, asparkershaft within said ushi'ng, I an arm fixed on said shaft; beyond arms andIaving now fully shown and described our the outer, end 'ofthe bushing,'a striker arm rotatablymounted Ion the bushing immedi- 'ately in rearofthe 'reduced' ortion thereof,

being adapted to contact: wit the other arm, a s ring coiled about said'reduced ortion "of t e bushing with" its endsoperative y con;

n ected-with said arm,'and means foractuatirig the -strikerarm, I

n test-unony-"whereof we. have hereunto subscribed; our names n thepresence of two subscribing yiritnefsses.

HARRY- G. COULSON.

CHARLES 'O.- COULSONJ.

Witnesses?

